Matthew Dea

Science: Latest Scientific Discoveries

Tag: Hank Green

Torque: Crash Course Physics #12

Torque: Crash Course Physics #12

You have a box. A ring. And a marble. And they’re all at the top of a ramp. Because you know how physics loves ramps. Especially hypothetical ramps! So, let’s say this ramp would allow for static friction, but not kinetic friction. Now, you let go of all of these objects at the same time, […]

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Electric Fields: Crash Course Physics #26

Electric Fields: Crash Course Physics #26

Last time, we talked about how charged particles exert electrostatic forces on one another. We calculated these forces using the charge of each particle: which can be either positive or negative, and the distance between them, and we did it with the help of Coulomb’s Law: the equation that tells us the force generated by […]

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Computer Networks: Crash Course Computer Science #28

Hi, I’m Carrie Anne, and welcome to CrashCourse Computer Science! The internet is amazing. In just a few keystrokes, we can stream videos on Youtube — Hello! — read articles on Wikipedia, order supplies on amazon, video chat with friends, and tweet about the weather. Without a doubt, the ability for computers, and their users, […]

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The Industrial Revolution: Crash Course History of Science #21

The Industrial Revolution: Crash Course History of Science #21

You probably know some of the signs of industrialization in the nineteenth century: Trains connected cities, symbolizing progress. But they also brought about the destruction of rural lands, divisions between social classes, and rapid urbanization. Clocks, meanwhile, became technologies of standardization: They created a universal time, as opposed to a local “sun time.” But clocks […]

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How Trees Bend the Laws of Physics

How Trees Bend the Laws of Physics

Sometimes the simplest questions have the most amazing answers. Like how can trees be so tall? It’s a question that doesn’t even seem like it needs an answer. Trees just are tall. Some of them are over 100 meters. Why should there be a height limit? I’ll tell you why. Tress need to transport water […]

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Electric Charge: Crash Course Physics #25

Electric Charge: Crash Course Physics #25

The shock you get from a doorknob. That trick you used to do with a balloon, to make your hair stick up. Or, of course, a lightning strike. They’re all governed by the same principle: static electricity. Static electricity occurs when an object obtains a net amount of positive or negative electric charge, creating an […]

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Operating Systems: Crash Course Computer Science #18

Operating Systems: Crash Course Computer Science #18

This episode is supported by Hover. Hi, I’m Carrie Anne, and welcome to Crash Course Computer Science! Computers in the 1940s and early 50s ran one program at a time. A programmer would write one at their desk, for example, on punch cards. Then, they’d carry it to a room containing a room-sized computer, and […]

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Hackers & Cyber Attacks: Crash Course Computer Science #32

Hackers & Cyber Attacks: Crash Course Computer Science #32

Hi, I’m Carrie Anne, and welcome to CrashCourse Computer Science! Last episode, we talked about the basics of computer security, principles and techniques used to keep computer systems safe and sound. But, despite our best efforts, the news is full of stories of individuals, companies and governments getting cyberattacked by hackers, people who, with their […]

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Biomedicine: Crash Course History of Science #34

Biomedicine: Crash Course History of Science #34

Who’s ready for more World War Two science? No? No one? Well, this story is about all kinds of badness, yes—but also a lot of incredible goodness. The history of science up until the Cold War is often overshadowed by the Manhattan Project. But today we are going to talk about advances in biomedicine, or […]

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Memory & Storage: Crash Course Computer Science #19

Memory & Storage: Crash Course Computer Science #19

Hi, I’m Carrie Anne, and welcome to Crash Course Computer Science! We’ve talked about computer memory several times in this series, and we even designed some in Episode 6. In general, computer memory is non-permanent. If your xbox accidently gets unplugged and turns off, any data saved in memory is lost. For this reason, it’s […]

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